Registration Number
0224U031514,
0121U109766
, R & D reports
Title
Synthesis of new intermetallic compounds and crystal-chemical algorithm for creating highly efficient materials
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Head
Hladyshevskyi Roman Ye., Доктор хімічних наук
Registration Date
06-05-2024
Organization
Ivan Franko National University of Lviv
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Alloys of rare-earth, alkaline/alkaline-earth metals, d-elements and p-elements of groups 13-15 of the periodic system were synthesized and chemical and phase analyses were carried out. The extensions of solid solutions and homogeneity ranges of compounds were determined, and phase diagrams of 6 binary, 37 ternary, and 2 quaternary systems were constructed. Conditions of formation were established and methods of synthesis of new and modified intermetallic phases were developed. By means of X-ray powder and single-crystal diffraction, the crystallographic parameters of 199 intermetallics, 7 hydrides and other inorganic compounds were determined. 18 new structure types were discovered. Crystal-chemical peculiarities were deduced, quantitative characteristics of the chemical bonding were established, and the electronic structures were calculated for 35 new multicomponent compounds. Electrochemical hydrogenation/lithiation was performed for 8 phases, and quantitative characteristics of hydrogen sorption properties were determined for 6 phases. Superhard composites based on B4C (B4C–TiB2, B4C–NdB6) were synthesized and their hardness was measured, electrotransport and thermoelectric properties of 50 phases and parameters of magnetic properties of 37 intermetallics were estimated. Ukrainian patents were obtained for thermoelectric and thermometric materials (solid solutions based on the Heusler phases Ti1-xNbxNiSn and TiNiSn1-xAlx). Systems of composition-structure-properties relationships, based on precisely determined crystallographic parameters, peculiarities of the electronic structures, and chemical and physical properties were deduced for compounds with functional properties: electrochemical, hydrogen sorption, mechanical, thermoelectric, magnetic. The systems of relationships made it possible to develop the crystal-chemical algorithms for controlled synthesis of compounds with desired properties.
Product Description
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Ivanushko Andriana А.
Volodymyr S. Babizhetskyy
Broda Anastasiia I.
Roman Y. Gladyshevskii
Miliyanchuk Khrystyna Yu.
Milashius Viktoriia E.
Danylo T. Maryskevych
Ohonovskyi Illia K.
Pavlyuk Volodymyr V.
Pavliuk Nazar V.
Pukas Svitlana Ya.
Lyubov P. Romaka
Saidov Nazar R.
Tarasiuk Ivan I.
Tyvanchuk Yurii B.
Yaroslav O. Tokaychuk
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2024-05-06
